Automatic valve-rod-adjusting device



Feb. 13, 1923.

C. B. WARE AUTOMATIC VALVE ROD ADJUSTING DEVICE Fed Jan, 17, 1921 2 sheets-sheet csa Feb. 13, 1923'.y A

- t C. B. WARE AUTOMATIC VALVE ROD ADJUSTING DEVICE 2 sheets-,sheet "2 Filed Jan. V7, 1921 1 Patented Feb. 13,A 1923.

-Um'rau STATES' PATENT OFFICE.

CHALES B. WARE, OF PHILADELPHIA, PENNSYLVANIA.

AUTOMATIC vALvEmomanausTinG Application inea Januaryfi?, 192i. serialgNo. 437,783.

To all whom t may concern.' Beit vknown that I, CHARLES Bj VARE, a citizen o-f the United Sta-tes, residing in Philadelphia,- Pennsylvania, have invented an Automatic Valve-Rod-Adjusting Device, of which the following is a Vspecification. r

One object of my invention is to provide I a device for automatically taking up lost ino- 1o tion developing from wear the valve gear of an internal combustion engine, thereby to prevent the loosening of parts and the development of noisesl in the apparatus; a further object being the provision ofconvenient means for resetting the automaticdevice after the latter has moved through the limit of its action.

The invention will be more readily understood from the attached drawings, in which: Figure 1 vis a vertical section of the valve mechanism of 'an internal combustion engine, showing my device in use;

Fig. 2is a vvertical section of my device assembled but detached from the valve gear; Figs. 3aL to 3e are detached perspective of the device; e Fig. 4 is a detached perspective of a portion of the device illustrating the method of operation;

, Fig. 5 is a detached perspective lof the pore tion of the device illustrated in Fig. 4, showing the parts in original starting position; and v Fig. 6 is a vertical section illustrating the application of the device to overhead valve mechanism.

With reference to the drawings, 1 indicates y the engine casing,in which is mounted'a valve 2, the stem 3 of which extends downwardly j through a suitable vertical bearing or guide 4, the bottom of the stem overlying the top i of la vertically disposed push rod 5, said push rod being mounted in a suitable vertical bearing or guide 6 on the engine frame. The

45 push rod 5 has at its lower end 'al small wheel or roller 7, which is retained by means of a spring which exerts a dwnward thrust upon the push rod, against the surface of a cam 8 upon the cam shaft 9 of the engine,

said cam beingsuch that as the shaft 9 rotates, the push rod is reciprocated vertically. A spring 10 is confined in the present instance between the under side of the bearing member 4 and a collar or spring rest 11 seJ cured to the lowerend of the valve stem 3,

said spring 10 tending to retain the valve 2 totsseat. 'l

Carried in the top of the push rod 5 and constituting an' interposed element between the yalve stem and the push rod is the device which constitutes the `subject of -the present mventlon. This device comprises in its preferred form a base element l2 having a portion l12a adapted to fit within a suitable recess 5a in the top of the push rod 5saidelement 12 comprisingin addition agcylin Y drical collar-'likeV inemberl, the upper face `of which isshapedto formtwo inclined cam surfaces 138, 13u. upwardly through the center of the said cam member13.

A pin or rod 14 extends Provided with a central aperture 16 and adapted to receive the pin 14, which extends therethrough, is a second cylindrical cam member 1 5, the under face.. of which is` shaped to form inclined cam surfaces `153.15%,.,similar tothe cam surfaces 13a of the member v13 'and-adapted t0 co-op r aces 1n a man# erate with Asaid latter cam su ner to be described hereinafter.

The device further comprises a top element 17 having a bore 18 extending inwardly and centrally of the .underside and adapted i to receive the upper end of the pin 14, and having a threaded recess 19 in the. top there of for the reception of a threaded' bolt 20, p

inthe manner most clearly shown in Fig. 2.v A lock nut 21 is also provided whereby the said bolt maybe retained in any desired po`.

sition in the said member'l?.

posed' between the elements 15 and 17, the purpose of this washer to be set -forth here inafter.. A casing 23 is provided which rests l 4 upon the iiange 12b of the member 12, and which is adapted to be secured to said member by means of a suitable pin or set screw y i 24 extending Vthrough an aperture in the base of the casing 23 and into a recess formed in the side of the member 12. The rcasing 23 has also at the top an inwardly extend- 91)' 1 A spring. washer 22 isi-preferablyinter tween the wallsfof thecam elements.

12 and 17 and'the casing 23 when assembled are rotationally immovable with respect to each other. e

Established in the side of the casing 23 is an inclined slot 27, and extending through the said slot and beyond the outer surface of the casing 23 is a pin 28 which is suitably secured to the member 15. v

`When the elements Iof the device are assembled as shown in. Fig. 2,\a cavity 29 is formed by adjoining recesses in the members 12 and 15, said cavity 29 being formed be Established within this cavity 29 is a coiled spring 30, the ends of which are suitably secured to the members 12vand 15, respectively', the said ends of the spring in the present instance being established within suitable recesses in the said elements, as most clearly yshown inv Fig. 2.

The spring 30 tends to rotate the said members 12 and 15 in opposite directions,

and the interengaging cams 13a and 15a arev Asuch that when the said elements are rotated relatively by the said spring, the element 15 rides upwardly upon the element 12, in'

the manner shown in Fig. 4, which shows the said elements in an extreme separated condition which they. assume after being rotated by the saidl spring. The said slot 27 is'inclined at the same angle to the horizontal as'the surfaces of the cams13a and i. 13a and'15a that when the pin 28 is at the lower end of the slot the two elements 15 and 13 are close together, as shown in- Fig.

5, but when the said member is revolved sufficiently to carry the pin 28 to the upper end.

of the slot, further rotationalmovement of the part-s is prevented by the pin abutting the said `upper end, leavingV the elements in the position shown in Fig. 4. By manually returning the pin 28 to the lower end of the slot, the said element 15 is .revolved and :ipshbrought back to the low position shown in 1 5.

n applying this device, the memberl 12 is suitably attached to the upper end of the push rod and the bolt 2O is so adjusted that it lies in contact with the bottom of the valve' stem when' the valve is on its seat.

.There is thus no lost motion between the cams upon the shaft 9 and the valve. As-

the parts become worn, however, the device expanding acts automatically to take up the .play developing from the said wear, the

member 17 upwardly in the casing'.v The 1 said spring Washer 22 interposed b 'etweenthe Lasalle top element and theelement 15 holds the said elements slightly separated so that allowance is made for the expansion of the parts when' they become heated. When the parts are worn so that the device is extended to -the limit of its movement and the pin 22S reaches the upper end of thevslot 27, the del interposed between the said push rod and the reach rod 31, which extends to the rocker this case the upper end of the valve stem 33 of the valve 34.

lt will b e understood that considerable modification is possible with no departure from the essential features ofthe invention.A

Thus for example, many full equivaientsof the cams illustrated may be employed with considerable modification in the form of the device.

'I claim:

1. In a device of the character stated, the combination with a casing, of a pair of elements mounted in said casing end to end,

' arm 32, said rocker arm in turn engaging in l ments mounted in said casing end to end.

and adaptedfor relative translational movement toward and from each other, means for preventing rotation .of one of the elements in the casing, aspring tending to rotate the other element 1n the casing, said elements being so formed on their Aadjacent faces that rotationof'said spring-actuated element effects relativetranslational movement ofthe elements, and resilient means in said casing adapted to exert pressure against the outer end of one ofsaid elements.

'3. The combination of a reciprocating valve element, a driven actuating element for said valve, and a device interposedbetween said elements comprising a casing, an element fixed in said casing, an element movable in said casing both 'rotationally and axially with respect to said fixed element and normally in contact with said fixed element, means whereby rotational movement of said element eects movement 'thereof axially of the said fixed element, a spring tending to rotatey Said movable element,y a slot in said casing, and a pin secured in said movable element and extending through the slot. 4- i 4. The combination of a reciprocating valve element, a driven actuating element for said valve, and a device interposed be- -tween said elements comprising acasing, 'an

element fixed in said casing, an element movable in said casing botli rotationally and y axially with respect to said fixed element and normally in contact with said fixed element, means whereby rotational movement of said element effects movement thereof axially of said fixed element, a spring tending to rotate said movable element', a third element mounted in said casing and free to move longitudinally' therein, means preventing rotation of said third element in the `casing, and a member carried by said third member and extending beyond the end of the casing and adjustable longitudinallyr in said element.

5. The combination of a reciprocating valve element, a driven actuating element.

for said valve, and a device interposed between said elements comprising a casing, an element fixed in said casing, an element movable in said casing both rotationally and axially with respect to said fixed element and normally in contact with saidfixed .element, means whereby rotational movement of said element effects movement thereof axially of said fixed element., a spring tend:V

ing to rotate said movable element,aA third element'mounted in said casing and movable longitudinally therein, means for preventing rotation of said third element in the casing, and resilient means interposed between said movable and third elements'and tending to retain them'apart.

6. The combination of a reciprocating I* 1 valve element, a driven actuating element for said valve, and a device interposed between said elements comprising a casing, an

eleinent fixed in said casing, an element mov- K able in said casing both rotationally and axif ally with respect to said fixed element and normally in contact with said fixed element, interengaging cam surfaces upon said fixed and movable elements whereby rotational movement of the latter element effects movement thereof axially of said fixed element, a

spring tending to rotate said movable ele- CHARLES B. WARE. 

